Human life is meant for cultivation of spiritual knowledge, in eternal relationship with the Supreme Personality of Godhead, and the executive heads of all states and all planets are obliged to impart this lesson to the citizens by education, culture and devotion.
(Bhagavad-Gita----4:1----purport).

The civilized form of human life is meant for man's reviving the lost consciousness of his eternal relation with the Supreme Truth, the Personality of Godhead Śrī Kṛṣṇa, who is all-powerful. Whoever loses this chance is classified as a narādhama.
(Bhagavad-Gita----7:15----purport).

Human life is a means by which the living entity can end all the miseries of the hard struggle for life in material existence and by which he can return to Godhead, his eternal home. But, due to a bad system of education, men have no desire for self-realization. Even if they come to know about it, they unfortunately become victims of misguided teachers.
(Srimad Bhagavatam----1:1:10----purport).

No animal, bird or beast is bereft of this sense pleasure. In every species of life, including the human form of life, such happiness is immensely obtainable. The human form of life, however, is not meant for such cheap happiness. The human life is meant forattaining eternal and unlimited happiness by spiritual realization. This spiritual realization is obtained by tapasya, or undergoing voluntarily the path of penance and abstinence from material pleasure.
(Srimad Bhagavatam----1:3:13-----purport).

Our duration of life is measured, and no one is able to enhance it even by a second against the scheduled time ordained by the supreme will. Such valuable time, especially for the human being, should be cautiously spent because even a second passed away imperceptibly cannot be replaced, even in exchange for thousands of golden coins amassed by hard labor. Every second of human life is meant for making an ultimate solution to the problems of life, i.e. repetition of birth and death and revolving in the cycle of 8,400,000 different species of life.
(Srimad Bhagavatam----1:13:17----purport).

They have many subject matters for hearing—political, scientific, social, economic and so on—but due to a poor fund of knowledge, they set aside the question of the ultimate miseries of life, namely miseries of birth, death, old age and disease. Factually, the human life is meant for making an ultimate solution to birth, death, old age and disease, but the gṛhamedhīs, being illusioned by the material nature, forget everything about self-realization. The ultimate solution to the problems of life is to go back home, back to Godhead, and thus, as stated in the Bhagavad-gītā (8.16), the miseries of material existence—birth, death, old age and disease—are removed.
(Srimad Bhagavatam----2:1:2----purport).

Since the living entities are never destroyed, the annihilation of the material world does not annihilate the existence of the living entities, but until liberation is attained one has to accept one material body after another, again and again. The human life is meant for making a solution to this repeated change of bodies and thereby attaining a place in the spiritual sky, where everything is eternal, blissful and full of knowledge. In other words, the subtle forms of the living entities take place in the heart of the Supreme Being, and such forms take tangible shape at the time of creation.
(Srimad Bhagavatam----2:6:11----purport).

From natural instinct he used to serve Lord Kṛṣṇa, even in his childhood. He used to play with dolls in the form of Kṛṣṇa, he would serve the dolls by dressing, feeding and worshiping them, and thus he was constantly absorbed in the play of transcendental realization. These are the signs of an eternally liberated soul. An eternally liberated soul is a devotee of the Lord who never forgets Him. Human life is meant for reviving one's eternal relation with the Lord, and all religious injunctions are meant for awakening this dormant instinct of the living entity.
(Srimad Bhagavatam----3:2:2----purport).

However, since there is a chance of one's falling down again into the material sky from the Brahman effulgence, Śrīla Jīva Gosvāmī advises that in this human form of life one's only aim should be to go back home, back to Godhead. The words sa vañcitaḥ indicate that once a person has obtained the human form of life, he is actually cheated if he does not make preparations to go back home, back to Godhead. The position of all nondevotees, who are not interested in going back to Godhead, is very much lamentable, for the human form of life is meant for executing devotional service and nothing else.
(Srimad Bhagavatam----4:23:28----purport).

The blind man may take the lame man over his shoulder, and as he walks the lame man may give him directions. Thus combined they may work, but individually neither the blind man nor the lame man can walk successfully. Similarly, this human form of life is meant for the advancement of spiritual life and for keeping the material necessities in order. Especially in the Western countries there are ample facilities for material comforts, but no one has any idea of spiritual advancement.
(Srimad Bhagavatam----4:25:13----purport).

Human life is meant for self-realization. First of all one has to realize his own self, which is described in this verse as nijam. Then he has to understand or realize the Supersoul, or Paramātmā, the Supreme Personality of Godhead. However, when one becomes too much materially attached, he takes a woman to be everything. This is the basic principle of material attachment. In such a condition, one cannot realize his own self or the Supreme Personality of Godhead.
(Srimad Bhagavatam----4:27:4----purport).

If a man is in good consciousness, he consults with his religious wife, and as a result of this consultation, with intelligence, one advances in his ability to estimate the value of life. In other words, if one is fortunate enough to have a good, conscientious wife, he can decide by mutual consultation that human life is meant for advancing in Kṛṣṇa consciousness and not for begetting a large number of children. Children are called pariṇāma, or by-products, and when one consults his good intelligence he can see that his by-products should be the expansion of his Kṛṣṇa consciousness.
(Srimad Bhagavatam----4:27:6----purport).

"Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion—at that time I descend Myself." In this age, at the present moment, there are inordinate discrepancies in the discharge of human duties. Human life is meant for God realization, but unfortunately the materialistic civilization is stressing only the senses of the body, not understanding the living force within the body.
(Srimad Bhagavatam----10:2:20----purport).

Śrīla Bhaktivinoda Ṭhākura has therefore said that the advancement of material knowledge renders a person more foolish, because it causes one to forget his real identity by its glimmer. This is doom for him, because this human form of life is meant for getting out of material contamination. By the advancement of material knowledge, people are becoming more and more entangled in material existence. They have no hope of being liberated from this catastrophe.
(Nectar of Devotion).

Human life is meant for God realization, and the human being is given higher intelligence for this purpose. Those who believe that this higher intelligence is meant to attain a higher state should follow the instructions of the Vedic literatures. By taking such instructions from higher authorities, one can actually become situated in perfect knowledge and give real meaning to life.
(Nectar of Instruction).